Mo Nianyi had a car accident in high school and lost all her previous memories. Ten years later, at the age of 27, she came to a high school and became a teacher. One day, a transfer student was transferred to her class. This strange boy reminded her of her past. Could it be that this boy had something to do with her past? Although she was very cynical and made all the female classmates in the class lose interest in studying, Nianyi found that she fell in love with this boy who was 10 years younger than herself... And all the strange things that happened after he came to school made people doubt the identity of this boy. Who is he? What does it have to do with Nianyi's past? A gothic lament about eternity, an unforgettable love from the early years to the end of the world...